Expensive Dac to keep or cheaper and change overtime

Good evening all, I was wondering if people had thoughts about dacs and changing over time versus keeping an expensive unit that is upgraded.  I currently have a Gustard A22 that I do enjoy , I use I2s for SACD and USB for streaming (mainly Amazon) I have wondered about a PS Audio directstream mk2 that is said to be upgraded via new software which sounds good rather than the evolution of cheaper dacs.i have read that the previous PS Audio has been a model for 8 years which sounds reassuring. I use a Primaluna Evo 300i with Zu Audio Soul 6 , the Gustard  A22 with a Node (latest version) though that might change.,I have a PS Audio Power plant 12 , ZU Undertone Mk2 with cables by Zu and Nordost.  Any advice would be appreciated.